Cox Babe Bee vs AP Wasp - RC Groups
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Oct 31, 2017, 09:15 PM
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Cox Babe Bee vs AP Wasp


Ok...I hope I have y'all hooked now!

I have a 50+ year old Scientific P-40 (not the Red Tiger) recently picked up. This one is unusual in that it is 24" WS symmetric airfoil vs the 18" flat-bottomed airfoils of the other profile fuse, built-up wing kits (like the Scientific FW90 and Typhoon).

The plans show an 8cc tanked Cox reedie...I'm considering an AP Wasp with an 1 ounce tank. Dunno which way to go?!?

Pics and details are over in Control Line.

Any ideas or recommendations are welcome.

Thanks in advance.
Last edited by 944_jim; Oct 31, 2017 at 10:32 PM. Reason: More detail
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Oct 31, 2017, 10:27 PM
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Test run your AP on the same prop as the reedy, and decide if you want to go that slow. I would go AP with longer 42' lines over any reedy except maybe a Venom.
Oct 31, 2017, 11:02 PM
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Thanks Aspeed. I like the idea of longer lines.
Why do you say "that slow?"

My Lil Satan clone flies great on 35' lines and a Golden Bee. If it had wheels, I would try 42' lines. It is hard enough to get one of my sons to chuck the Satan for me.
Nov 01, 2017, 08:22 PM
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I last flew a little combat with a reedy on a Lil Bat combat. It seemed fast enough on 30 ft lines, but went slack and just seemed mushy on anything but level flight. A Satan would be better. I had something similar to a Satan as a kid and it felt very solid and was great on 42 ft. lines with a TD .049. I think the AP would be similar. I said to run it because I only have one AP .06, and it doesn't keep a tune. I got it used, and I guess it was worn out. I have lots of AP .09 and .15s that are fairly strong runners without a muffler.
Nov 02, 2017, 09:45 AM
the great Gassif´er
For what it is worth: my AP Wasp ran about the same or slightly better than my Cox TeeDee 051.

The wasp should eat any reedy for breakfast any day AFAIK....
Nov 02, 2017, 03:49 PM
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This was the very first plane I ever built!


It's great to see another. I made an appeal on RCG for a copy of this plan some time ago with the intention of building another and a kind fellow RCG'er scanned and sent it to me. I have attached the CAD file and the files for those that want to laser cut their own. The cowl would be a bit problematic unless you took a plaster cast and vac'ed your own but I think most of us would have left it off anyway.
Nov 02, 2017, 06:42 PM
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Quote:
Originally Posted by belli
It's great to see another. I made an appeal on RCG for a copy of this plan some time ago with the intention of building another and a kind fellow RCG'er scanned and sent it to me.
Wow...first-hand knowledge of the kit! What engine did you have in it? How well did it fly? Can I expect inverts, wing-overs, loops, eights? Please answer...

I did pull a casting/plug, but I have no heat/vac system. My intent is to cut off 1/8" from the front and double-ply the nose. The primary bulkhead and braces will be glued in place. The extra one will be drilled to bolt on to the rest so that I can change engines, engine-placement at will without tearing the plane apart.
The plug goes to Dave Cowell of DPCModels as he got the wood scans/original plans from my kit so he can reproduce them like the rest of his line.

Thanks for jumping in...and check out progress as I report over in Control-Line.
Nov 02, 2017, 06:43 PM
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Quote:
Originally Posted by Brutus1967
For what it is worth: my AP Wasp ran about the same or slightly better than my Cox TeeDee 051.

The wasp should eat any reedy for breakfast any day AFAIK....
That's what I needed to hear. The build goes on wrapped around the Wasp then!

Thanks a bunch for your input.
Nov 08, 2017, 10:20 PM
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Lookyhere


Just a quick shot. The firewall is drilled out for the Bee as originally planned by Scientific.
The AP Wasp mount is drilled to match the Bee pattern.
Right now the plane can still go either way. I may bolt on a Bee for the initial flight, and then pop on the Wasp. Then the plastic cowl will be trimmed to fit the chosen engine.
Nov 09, 2017, 08:05 AM
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Amp Abuser's Avatar
If no cowl would balance better aesthetically, thrust across the airfoil and loading during landings if lower on the firewall.
The cowl sure wants you to invert that engine lol.

Nov 09, 2017, 08:52 AM
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JohnsPop's Avatar
Quote:
Originally Posted by belli
The cowl would be a bit problematic unless you took a plaster cast and vac'ed your own but I think most of us would have left it off anyway.
You could also sand down a wooden plug to shape and melt a plastic drink bottle around it with a heat gun. That works pretty well too.
Nov 09, 2017, 08:54 AM
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JohnsPop's Avatar
Quote:
Originally Posted by Amp Abuser
The cowl sure wants you to invert that engine lol.
My first thought, but didn't know how well the smaller engines run upside down. I've never run one like that. Looks very nice Jim! Nice model.
Nov 09, 2017, 01:09 PM
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Gentlemen, all good points! I appreciate the input, and will look closer at the suggestions. This is why I dropped the post here.

I looked at inverting the engine, but that puts all the plumbing inboard, and lower that the tank. I had problems fueling a similrly setup Norvel, with the tank higher than the venturi

I have the original cowl, still unglued. Putting the Wasp right side up places all the plumbing outboard, with fuel coming in just about level with the tank. It also means, unfortunately I'll be cutting out a bathtub looking hole topside.

The jury is out on the Wasp...I'm leaning towards that engine hard since I want the Bee to stay on my Lil Satan.

More to follow as the build continues!


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